Dinosaur bones unearthed at one of Australia's richest fossil sites have introduced us to a new species: Savannasaurus, one of a family of huge dinosaurs that trekked here more than 100 million years ago.

Hummingbird-pollinated flowers evolved perfectly to suit the bird’s bill shape, its colour vision and even its taste buds. This is the beauty of co-evolution, where two species interact so closely that…